Home/CVE/A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker c
CVE

CVE-2021-20093

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker c

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.

CRITICAL · CVSS 9.1 EPSS 0.08202
Act now
  • EPSS percentile: top 8% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
▤

Affected Products & Versions

14
wibu codemeter<= 7.21a
siemens pss capeall versions
siemens sicam 230 firmwareall versions
siemens simatic information serverall versions
siemens simatic pcs neo< 3.1
siemens simatic wincc oaall versions
siemens simit simulation platform>= 10.0 and < 10.3
siemens simit simulation platformall versions
⚠

Public Exploits & PoCs

1
pocwww.tenable.com · tra-2021-24www.tenable.com
▣

Scoring & Timeline

9.1
CRITICAL · CVSS v3.1 · vulnreport@tenable.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Jun 2021 · 12:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
⚑

Vendor Advisories

4
siemens-csafSSA-625850
siemens-csafSSA-675303
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-210-02
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-320-03
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdfMitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfPatchThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02Third Party AdvisoryUS Government Resource
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